Ammonium sulfate uses sulfuric acid color
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The yellow color of the sulfuric acid used in the production of AN sulfate – what impacts does this have on the AN sulfate product?
Is the yellow color of sulfuric acid caused by high levels of iron ions? Iron ions mainly affect the crystal size of sulfuric acid an during evaporation and concentration, potentially reducing its particle size slightly. Additionally, when producing industrial-grade sulfuric acid an, there are requirements regarding the amount of iron ions in the final product, which can have an impact ； Other factors have no impact on the AN sulfate product, nor do they have any adverse effect on the whiteness of the final AN sulfate.
Good sulfuric acid should be transparent; colored sulfuric acid has some effect on the color of ammonium sulfate, possibly giving it a green or blue tint, rather than keeping it very white.